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Firefox huge memory consumption - who's lying ?

I try to keep always open some tabs in Firefox,, probably already too many (it's not unusual to have 25-30 tabs opened, each having it's internet page). I'm using Firefox… (read more)

I try to keep always open some tabs in Firefox,, probably already too many (it's not unusual to have 25-30 tabs opened, each having it's internet page). I'm using Firefox up-to-date on Windows 10 Home already at version 20H2.

So, quite quickly Task Manager comes to report that Firefox takes 1400-1600 of RAM (out of the laptop's total of 6 GB). At the same time, Firefox's internal Task manager pretends that memory taken by all tabs does not sum up more than cca 650 MB !!! This is concur with about:memory tab if I try that too.

Here's a capture taken with Snip&Sketch having both Firefox's tab with it's internal task manager, + Windows's Task manager over it (attached).


I feel like I'm cheated here, but ... who is most closer lay blame on ? Who is more likely to lie in this case ?0 Firefox or Task Manager ?

I tend to believe it's Firefox, but I'm willing to have other opinions. Are there extra memory taken by Firefox that is not reported in the about:memory tab, or in it's internal task manager ? (I'm onto this, I believe that there is something that is not reported, but so far have not a shred of evidence on this).

This is exactly why on my computer at work (on an OpenSUSE install) I gave up on Firefox and turned to Chrome, because on this one I can trust the internal task manager, and it does not crush my Linux box like Firefox eventually have done with it's crazy memory consumption and/or CPU huge load from time to time. I am still using Firefox on the home Windows 10 laptop because I share it with my wife, and decided she is to use Chrome, and myself Firefox:-)

Asked by lenrocd 11 months ago

Last reply by webdev1 10 months ago